Wood-heel-concaving machine.



7 No. 796,194; PATENTED AUG. 1, 1905.

F. A. DAY.

WOO'D HEEL CONCAVING MACHINE.

APPLICATION FILED 4211.20, 1904.

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l F. A. DAY.

WOOD HEEL GONOAVING MACHINE.

APPLICATION FILED APB,20, 19b4- PA'TENTED AUG. 1, 1905,.

4 SHEETS-SHEET 8.

' PATENTBD AUG. 1,1905.

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- WOOD HEEL CONGAYING MACHINE.

' APPLICATION FILED APR. 20, 190

4 SHEETS-SHEET 44 I .Zfzuen 70 501?! w'ir 'swf Fig. 5 is a fronteleyation.

UNITED swarms To all whom it mlaly concern:

Be it known that I, FRED A. DAY, of Haverhill, county of Essex, State of Massachusetts, have invented an Improvement in Wood-Heel- (Joncaving Machines, of which-the following description, in connection with the accom panying. drawings, is a specification, 'li'ke characters on the drawings representing like 1 a machine made according .to rny invention.

Fig.2 is a side 'view thereof. Fig. '3 is a detail view of; the' cluteh mechanism. Fig. 4

is a detail View of theunlocking mechanism.

Fig. 6 is a crosssectio nal View in detail on the line 6'6 of Fig. 1. 4 Fig. 7 is a detail view on'the line 77 of Fig. 6. Fig.8 is a detail View on the line 8 8 of Fig. '1. Fig. 9 is a deta'il view onthe line '9 9 of Fig. 1. Figs. 10 and 11 are detail plan and side views of one of the clamping members. Fig'f 12'. an' enlarged cross-sectional view on the line 12 12 of Fig. 1. .Fig.

.13 is anenlarged cross-seotio'nal view of the heel-clamp: Fig. is" a detail perspective view of a part'of'oneofthe carriage-swinging levers. 1Fig115 is a 'persp ective view of a The frame, a 1s of any suitable or convenfient'form', and a shaft 6 is journaled thereon.

A cutter c is jjrnounted on said shaft, the bladesof which-are suitably shaped for the especial purpose of'concaving the top of a 'wood heel.

Two parallel rodsd are reciprocally'mounted in a bearing-piece'e, which is centrally pivoted ,on a bolt 6', said bolt being secured in a rocking shaft which is journaled in bearingse mounted on the frame. (See Figs. 1, 2,'andl).)

,Said rods 01 are rigidly connected'by a crossbar 0?, adjacent the rear ends thereof, and by a cross-bar 0Z at their front ends. Said rodsd are also reciprocally mounted in, bearingblocks f, said blocksf beingfslidabl'y mounted in a frame f, having ways formed therein by oppositely-arranged grooves; as shown "in Fig. 7. Said frame f is supported in the PATENT OFFICE. FRED A. DAY, OF HAVERHILL, MASSACHUSETTS.-

WOOD-HEEL-CONCAVING MACHINE.

Specification of Letters Patent. Y 7 Application filed April 20, 1904.. Serial No. 204,004.

of the levers t will bethrown'together by Patented Aug. 1,'- 1905.

middle thereof by an adjusting screw which is threaded in a suitable lug a on the frame, said screw f 'forming a pivotal hear ing for said frame and providing a means whereby the front end of the carriage, which is formed by said rods d and their connecting parts, may be raised or lowered. When said carriage is swung about the pivot, the frame f will swing upon screw f as a centre, and said blocks f will slide inthe frame to permit such movement. A pair of cam-plates g g are secured to the rods d, at oppositely-arranged points thereon, said plates being adapted to en-' gage the adjustable stops g 9 mounted on the frame, and to limit the lateral swinging movement of said carriage about the pivot-bolt e.

A crank-shaft his rotatably mounted in the frame, said shaft having a clutch-cone It splined thereon and acl'utch-pulley [t journaled thereon, said pulley being constantly driven, so that when said cone is thrown into engagement therewith the shaft b will be rotated. A crank it is provided on the shaft, and a connecting-rod it is connected to said crank and to the cross-bar d by a. double joint 57.

A clamp-holder i is mounted upon a pair of parallel rods kin, which pass therethrough, said holder having a threaded connection with the rod 7 and having a sliding connection with the rod is. The rod k is secured at its front end to a cross-bar k", and the rod k is journaled in said cross-bar 70 but held from longitudinal movement therein. A handwheel k is secured to the rod 70 so that the position of said holder '5 on the rods in k may be adjusted. A pair of springs m are pro-, vided on the rods k is, said springs being interposed between the rear end of the holder iand the adjacent side of the cross-bar d.- A pair of clamping-levers n are pivoted on the pins n", mounted in the holder c, the front ends ofsaid levers being provided with clamp: ing-jaws n on theiradjacent edges, and the rear ends-of said levers being provided with oppositely-inclined cam-faces n and straight portions ni the rear ends of said levers being drawn together by a spring a and said faces being constantly held against vertical pins 90*, rigidly mounted in the cross-bar d. Said parts are arranged so that when the holder 01 is pushed rearwardly until the stops in on the rods k 74 engage the cross-bar e the jaws n the pins n and held in this position as soon as said pins of bear against the straight portions n of the levers.

v The jaws n are removable, and their faces are made of readily-fusible metal, as solder, and are cast so that they fit the sides of the particular series of heels which are to be coneaved, said jaws being of such width that they grasp the heel from a point near the bottom to a point closely adjacent the top and from points near the front to the back thereof, thus centering the heel by the shape of the sides near the top. The heel is not supported or centered at all by its bottom surface, so that any inaccuracy in this surface will not affect the position in which the heel is clamped. A heel breast-stop 01 is secured on the holder 6, said stop cooperating with the jaws n in holding the heel. This particular form of heel-clamp is of special importance, for the reason that it not only centers the heel, so that the cutter may be uniformly guided close to the edge of the top of the heel, leaving an edge at the corner 'of uniform width, but it also relieves all strain which might otherwise be placed upon the waist or narrow portion of the heel if the heel were clamped or held by its bottom portion, thereby greatly decreasing the amount of breakage.

A sprocket-wheel is mounted on the shaft h, and a cam-shaftp is journaled in the frame and provided with a sprocket-wheel q in line with the sprocket-wheel o, a chain 9 passing over said wheels. The sprocket-wheel g has twice as many teeth as the wheel 0, so that the shaft will make one rotation to every two of the shaft h. A pair of cams s s are mounted on the shaft 9 at opposite sides of the carriage in position to engage the outer ends of arms t 6, said arms being pivoted on vertical pins t at their inner ends and normally extending in the general direction of the shaft p. Upwardly-extending hubs 6 are formed on the ends of each arm 6 t, through which pins 2," pass, and arms 6 6 are also pivoted on pins t, said arms extending longitudinally of the carriage toward the front in position to engage rolls t 25 mounted on opposite sides of a yoke t secured to rods d of the carriage. The upper ends of hubs i are provided with shoulders 6" 6 against which corresponding shoulders on the arms t 25 may bear, thereby limiting the extent to which the arms t 25 may be swung in one direction with relation to arms t A spring a encircles the hubs (6 of each arm 6 t the ends of said springs being connected, respectively, to said arms 25 t and their corresponding arms 6 6 Said arms t t and 6 t cooperate to form bellcrank' levers, the arms of which may yield with relation to each other in one direction, the springs a thereof acting normally to hold the shoulders of 'the. arms t 6 against the shoulders 2, 25 of the hubs.

The holder z' is provided with a lug i, and

a link i is pivotally connected to said lug at one end and to a bar 1: at its other end. Said bar 0 is reciprocally mounted in lugs e on the frame, and the rear end of said bar is provided with an inclined face, which is adapted to engage a roll to on one end of a shippinglever w, which is pivoted on a pin w, secured on the frame, the opposite end of said shinping-lever being forked and adapted to en gage the clutch-cone h.

A latch 00 is pivotally connected to the rear end of holder 6, said latch being adapted to fall into engagement with a yoke :12, which is adjustably secured to the rods (Z of the carriage when said holder is in its rearmost position on the carriage, as shown in Figs. 1 and 2. A bell-crank lever m is pivoted at m on the frame, and a finger w is secured to the shaft p in position'to engage one arm of said lever. The other arm of the lever is in position to lift the latch 03 out of engagement with yoke a when said arm is swung upward by finger 12* upon rotation of shaft the width of said latch being such that said lever may engage said latch in all positions of the carriage.

The operation of the above-described machine is as follows: The latch m having been lifted out of engagement with yoke a" the springs 721 will slide the holder 1: forwardly until the jaws a are separated to permit the removal of the finished heel. In this position the bar '2; will be'drawn back out of engagement with the shipping-lever w, so that the crank-shaft It will be stationary and the latch a; will be supported by its rear-end portion 11', which will then be resting upon the yoke 11:. The cutter-shaft 6 will be constantly rotated. The operator removes the finished heel from between the clamping-jaws and places another heel therebetween and then presses inward upon the bar causing the rods Z7 is and holder c" to slide on the carriage, carrying the levers a rearwardly, so that they slide upon the holding-pins 11/ and cause the clamping-jaws n to be brought together so as to engage and hold the heel firmly therebetween, as shown in Fig. 13. As the holder is pressed rearwardly the springs m will be compressed, and by the time the heel is firmly grasped by jaws n thelatch n; will have fallen into engagement with the yoke 03, so that said springs m cannot push back the holder and unlock the clamp, the stop-lugs Z2 at the same time engaging the bar 0. The rearward movement of the holder causes the bar o to slide rearwardly and the latter, acting upon the shipping-lever w, will throw the clutch it into engagement with the pulley if, causing the shaft It to be rotated. The cam-shaft will then be driven by chain 0' and the cam s" will engage the arm t" and swing it forward, and said arm, acting through spring a, will then cause arm to engage the roll t of the carriage and swing the latter upon its pivot 0 until the cam-plate g on the opposite side was; I .3

' of the carriage is pressed against its stop g.

The carriage will thenbe drawn rearwardly by the crank-shaft it, so that the heel will be drawn under and into engagement with the cutter, the cutter'acting to concave one side portion of the heel as the carriage is drawn rearward. During this rearward movement the cam 8, through the intermediate mechan+ ism, will hold cam-plate g against its stop g the shape of the cam-plate being such that the carriage will be swung so that the heel will be concaved close to its sides, leaving a narrow edge of uniform width, as shown in Fig. 15. If theshapes of the cam 8 and plate g do not happen to cor respond,'such variations will be compensated for by the intermediate spring-u. This arrangement permits the plates g g to be varied according to different heels without changing the came 8 8. The carriage will be carried rearward until the side portion of the heel opposite that toward which the carriage was swung is finished to the back side thereof, and then the carriage will be pushed toward the front again by the crank-shaft. As soon as the return movement begins the radial face on the cam 8 will pass the arm 6 and pass out of contact therewith, so that arm at will no longer bepressed against the roll t. At the same time the higher part of the cam 8 will engage the arm 25, causing arm 6 to engage roll 1& and swing the carriage in the opposite direction, so that the cutter will remove some of thecenter portion of the heel during the return movement. By the; time the crankshaft starts to draw the carriage rearwardly again the cam 8 will have moved the camplateg into engagement with its stop g,-the carriage being swung to the opposite side of its middle position from that shown in Fig. 1.

As the heel is'drawn under the cutter its opposite side will beconcaved in the manner.

before described, and the'concaving process 'Willthen be finished. Assoon as the second y from the shipping-lever 21;, causing the clutch i to be thrownout of action, so that shaft It 'willstop.

The parts are so adjusted and timed that all parts except the cutter and cutter-shaft will come to rest when the carriagehas been car 'ried to the forward limit of its movement; While this is taking place the operator'will be removing the finished heel and placing another heel in the clamp, and then he will push- Y the holder-inwardly agaim-and the above-described operation will be repeated. This arrangement will enable a heel to be concaved that the cutter will out beyond the back sideof the heel. Such adjustment is provided for by'thethreaded rod 70 and in case said holder is adjusted yoke. 00 and stops 76 must be correspondingly'adjusted. j The parts are adjusted and arranged so that it is impossible to move the clamping-jaws beneath the cutter while they are even partly unlocked, thereby avoiding all possibility of the heel being engaged by the cutter when it is not firmly held on the holder. Having'thus described my invention, what Iclaim as new,'and desire to secure by Letters Patent, is v t 1. Amachine for concaving woo-d heels comprising .arotatable cutter, 'a carriage, and

means for reciprocating the same longitudinally beneath the cutter, a heel-holder mounted on said carriage having a pair of clamping members, and means for moving said members together to clamp the heel, operated upon movement of said holder toward the cutter, substantially as described.

I 2. Amachine for concaving wood heels comprising a rotatable cutter, a carriage, and means for reciprocating the same longitudinally beneath the cutter, a heel-holder mount-' ed on said carriage and movable longitudinally thereof, said holder having a pair of clamping members, means on said carriage for moving said members together to clamp the heel as said holder is moved on the carriage toward the cutter, and means for separating said members as said holder is moved on the carriage inthe opposite direction, substantially as described.

3. A machine for concaving wood heels comprising a rotatable cutter, a heel holder, means for reciprocating said holder longitudinally beneath the cutter and means permitting transverse'movement thereof to opposite sides I of a middle position during successive reciprocations, and guiding-stops at opposite sides of said-middle position for limiting the transverse movement of the holder in all longitudinal'positions thereof, substantially as described.

4. A machine for concaving wood heels comprising a rotatable cutter, a heelholder, means for reciprocating said holder longitudinally beneath the cutter and yielding actuatingmeans for-moving it transversely to opposite sides of a middle position-during sue cessive reeiprocations thereof, and guidingstops at opposite sides of said middle position for limiting its transverse movement, substantially as described.

5. A machine for concaving wood heels comprising a rotatable cutter, a reciprocallymounted heel-holder, a crank-shaft and a connecting-rod for reciprocating said holder longitudinally, means permitting transverse, horizontal, swinging movement of said holder while it is being reciprocated, and guidingstops at opposite sides of the middle position of the holder for limiting the extent of its swinging movement, substantially as described.

6. A machine for concaving wood heels comprising a rotary cutter, a reciprocally-mounted carriage having a heel-holder thereon, driving mechanism for reciprocating said carriage, means for disconnecting said carriage and driving mechanism at the end of every two reeiprocations of said carriage and means for moving the carriage transversely to one side of a middle position during one reciprocation, and to the other side thereof during the other reciprocation, substantially as described.

7 A machine for concaving wood heels comprising a rotary cutter, a longitudinally and transversely movable carriage, a heel-clamp thereon, driving mechanism for reciprocating said carriage and means for disconnecting the carriage therefrom when it has been reciprocated a predetermined number of times, means for locking said heel-clamp, and means for unlocking said clamp simultaneously with the disconnection of the carriage from said driving mechanism, substantially as described.

8. A machine for concaving wood heels comprising a rotary cutter, a reciprocally-mounted carriage, a heel clamp holder reciprocally mounted on said carriage, locking and unlocking means for the clamp of said holder respectively operated upon movement of said holder in opposite directions on the carriage, driving mechanism for reciprocating said carriage, clutch mechanism for throwing said driving mechanism into and out of action, means connected to said holder for operating said clutch mechanism to throw the same into action when the holder is moved to lock its clamp, and out of action when the holder is moved to unlock its clamp, substantially as described.

9. A machine of the character described comprising a cutter, a reciprocally-mounted carriage, a clamp thereon, driving mechanism for reciprocating said carriage, clutch mechanism for throwing said driving mechanism into and out of action, means for opening and closing said clamp and means connected thereto for operating said clutch mechanism to throw the same into action when the clamp is closed and out of action when it is opened, substantially as described.

10. A machine for concaving wood heels comprising a rotary cutter, a reciprocallymounted carriage beneath the cutter, a clam p-' holder reciprocally mounted on said carriage, means for closing the clamp of said holder when the holder is moved on the carriage toward the cutter, and for opening the same when the holder is moved thereon in the opposite direction, means for reciprocating said carriage and means for moving said holder away from the cutter to unlock said clamp after a predetermined number of reciprocations of said carriage, substantially as described.

11. A machine for concaving wood heels comprising a rotary cutter, a reciprocallymounted carriage beneath the cutter, a clampholder reciprocally mounted on said carriage, means for closing the clamp of said holder when the holder is moved on the carriage toward the cutter and for opening the same when the holder is moved thereon in the opposite direction, driving mechanism for reciprocating said carriage, clutch mechanism for throwing said driving mechanism into and out of action, means formoving said holder away from the cutter to unlock said clamp after a predetermined number of reciprocations of said carriage, and means for simultaneously operating said clutch mechanism to throw said driving mechanism out of action, substantially as described.

12. A machine for concaving wood heels comprising a rotary cutter, a longitudinally and transversely movable carriage, a heelclamp thereon, driving mechanism for reciprocating said carriage, cam mechanism for moving said carriage transversely in opposite directions in time with the reciprocations of said carriage. and having a yielding connection with said carriage, and oppositely-located cam-plates for limiting the transverse movement of said carriage while it is being reciprocated, substantially as described.

13. A machine for concaving wood heels comprising a rotary cutter, a longitudinally and transversely movable carriage, a crankshaft for reciprocating said carriage, a camshaft and means carried thereby for moving said carriage transversely to one side of an intermediate position and then to the other side of said position and return during a single rotation of said cam-shaft, and connections between said shafts whereby said cam-shaft makes a single rotation to every two of the crank-shaft, substantially as described.

14:. A machine for concaving wood heels comprising a rotary cutter, a carriage, a support on which said carriage is reciprocally mounted beneath the cutter, a crank-shaft for reciprocating said carriage, a heel-holder slidably mounted on said carriage having a pair of clamping-jaws thereon, means carried by said carriage for moving said jaws together to clamp the heel as said holder is moved on the carriage toward said cutter and for separating them to unclamp it as the holder is moved in the opposite direction, a spring for moving said holder on the carriage away from In testimony WhereofIhave signed my name the cutter, a latch for locking theholder against to this specification in the presence of two submovement by said spring; and means, operscribing Witnesses.

ated' by said crank-shaft, for lifting said latch after a predetermined number of reciproca- Witnesses:

tions of said carriage, substantially as de- L. H; HARRIMAN', scribed. i H. B. DAVIS.

FRED A. DAY. 

